Nekked walls. Need advice on proper prep

We are rebuilding after Isaac , basically the house is gutted to 4 feet after 3 feet of water. All insulation yadda yadda is being replaced. I have painted many a house and love doing it but have never dealt with nekked drywall or ceilings for that matter.

The top half of the walls are some pretty funky colors (not mine, we had just moved in) and the bottom will be the new stuff. I usually prime and then 2 coats of paint but not sure how to attack this. Do I use gardz on everything then prime the wall and ceiling, or only gardz the new drywall areas only? Does one use a particular primer for new drywall?

As for painting the ceiling I assume its the same process as walls just from an akward angle. The house is split in two with the back half being empty and that way I can paint with concrete floors etc so drips are not an issue. Once the back half is done then we switch to the front half.

Thanks in advance.

Robyn

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Nekked walls. Need advice on proper prep

If the ceilings were already painted, no need to prime them.
All the rest, prime with a quality drywall primer and apply the 2 finish coats,prime the whole wall. Fresh Start from BM is another good choice

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Nekked walls. Need advice on proper prep

Thanks Chris, I forgot to mention in the original post that we decided if we are going to have to gut the house then we are going to GUT the house and so we yanked all the older than me ceiling tiles and have the ceilings drywalled as well. Nothing like biting off more than you can chew.

So if I read this right. We prime the new drywall with the drywall primer, then prime all the "omg who chose that dark purple" painted and newly drywall primed walls and ceilings (basically everything but the dog) and then on with the finish coats.

As an aside we just moved down here from martinsburg WV - small world.

Nekked walls. Need advice on proper prep

Okay cant find Gardz anywhere down here except home cheapo and that is 30 miles away, is there another option. Can I use the zins sealer/primer combo to seal the furry bits where I have to patch the sheetrock or do I need to take a roadtrip.